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Concentration effect of sodium chloride on enthalpic interaction coefficients of D-mannitol and D-sorbitol in aqueous solution

Authors :
Lin Wei Li
Xiao-Mei Qiu
Lan-Ying Zhu
You-Ying Di
De Zhi Sun
Source :
Journal of Thermal Analysis and Calorimetry. 89:295-301
Publication Year :
2007
Publisher :
Springer Science and Business Media LLC, 2007.

Abstract

The dilution enthalpies of D-mannitol and D-sorbitol in aqueous sodium chloride solution at various concentrations have been determined by isothermal microcalorimetry at 298.15 K. The homogeneous enthalpic interaction coefficients over a quite large range of concentration of aqueous sodium chloride solutions have been calculated according to the excess enthalpy concept. The results show that enthalpic pairwise interaction coefficients (h 2) of D-mannitol and D-sorbitol are positive in aqueous sodium chloride solution and become more positive with increase of the concentration of sodium chloride. The results are interpreted in terms of the different conformations of the two polyols, solute-solute and solute-solvent interactions involved by solvent effects.

Details

ISSN :
15728943 and 13886150
Volume :
89
Database :
OpenAIRE
Journal :
Journal of Thermal Analysis and Calorimetry
Accession number :
edsair.doi...........b1c7dafb27430d98a4d2caff73aac461